XN-Matt There must be a better way of doing this. Maybe looking at the input and having a field and if they enter www. strip this out as it'll be created automatically anyway. Which then solves both issues of being a visual oddity and those users who are pre-programmed to enter www everywhere as part of the domain itself.
I think this is how it was in the early versions of Enhance but it caused a lot of end user confusion and by customer request we added the www prefix to indicate that it's added automatically.
We might add some platform settings around this so that you guys (the hosts) can decide what is best for your users.
We're going to add this functionality as a configurable option. The mail routing will be decided based on the MX IP(s) and the customer will not be able to override. There will also be a way to configure proxy MX IPs so that the mail routing can still be set to local if one of those IPs is detected, for customers using external mail filtering services.
We are also adding configurable domain blacklisting. This is likely to come first.